P.M. Shanks&Co, or the Patent Type Foundry was based in 31 Red Lion Square in London. The foundry was started 1855 by John Huffam King. It was renamed Patent Type-Founding Company in 1857. The foundry purchased a Johnson automatic typecasting machine in 1873. Known as P.M. Shanks & Co. from 1881 and finally as P.M. Shanks and Sons, Ltd. until its merger with Stevens to form Stevens, Shanks & Sons Ltd. Its Epitome Specimen Book of Printing Types Manufactured by the Patent Type Foundry (1890) offers little help--no full type showings, and no grand designs. The name "siderographic" caught my eye---they used it to name ornate and ornamental headline type. For example, Siderographic Ornate is from 1872. Scan of the Edwardian typeface Pretorian.